Motherboard Identification

Archived from groups: alt.comp.hardware.homebuilt (More info?)

On Sat, 19 Mar 2005 13:05:04 GMT, Newfdog
<newfdog2nospam@warp.nfld.net> wrote:

>what I need is a utility to identify the model number of the motherboard

http://www.plasma-online.de/englis [...] html&e=912
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Archived from groups: alt.comp.hardware.homebuilt (More info?)

On Sat, 19 Mar 2005 13:05:04 GMT, Newfdog
<newfdog2nospam@warp.nfld.net> wrote:

>hi all...... Just picked up a bunch of parts for nothing and have
>assembled a working machine from them. It's a p166 running on an Aopen
>motherboard with Win 98Se. I have a bunch of higher order pentiums and
>what I need is a utility to identify the model number of the motherboard
>so I can check it's specs for use with a different processor.
>
>Thanks
>Newfdog

The specs may not help so much, as they were usually drawn
up when boards first came out but not appended later. For
example, most boards with separate vcore setting (dual
voltage) can run a K6-2 CPU, though you might have to guess
at the multiplier or voltage jumpers... guess meaning look
at what is listed and find the pattern, not really "guess"
as it would be too easy to overvolt the CPU.

Then again if you remove the CPU and are able to find the
power supply output (the board's power supply for CPU) you
can check the resultant voltage without CPU installed by
turning system (electrically) on. Any later K6-2 CPU will
interpret a 2X multiplier as 6X so even if board only has 66
thru 83MHz FSB, you could still get 400MHz as 66 x 6. K6-2
upgrades work best on boards with switching rather than
linear power regulation, evidenced by the doughnut-shaped
inductors onboard, among other things.

Archived from groups: alt.comp.hardware.homebuilt (More info?)

On Sat, 19 Mar 2005 16:26:35 -0600, David Maynard
<nospam@private.net> wrote:


>> The specs may not help so much, as they were usually drawn
>> up when boards first came out but not appended later. For
>> example, most boards with separate vcore setting (dual
>> voltage)
>
>That's going to be what to look for because if the existing pentium 166 is
>a classic pentium, not MMX, and the motherboard is a single voltage to
>match then the max is 200 MHz and that's not enough over 166 to bother with.


True. I happen to have at least one of those boards around
here *somewhere*, but I dont' even know if it works. A
related thread was posted by OP in alt.comp.hardware
regarding P200MMX usage, at which point I consulted some
docs I'd archived previously. The board does support
seperate VIO and Vcore but also has at least some linear
supply components, if not entirely linear. Supoprts at
least down to 2.5V Vcore though, the jumpers for that are
known. Following partially copied from an old Aopen
webpage.


JP11 CPU Core Voltage (Vcore)
------------------------------------
1-2 3.45V (P54C or IDT C6)
3-4 3.52V (Cyrix or AMD K5)
5-6 2.5V
7-8 3.2V (AMD K6-233)
9-10 2.8V (PP/MT P55C)
11-12 2.9V (AMD K6-166/200)


JP12 I/O Voltage (Vio)
-----------------------------
1-2 3.45V (default)
3-4 3.52V


JP3 JP13 CPU Type (Vcpuio)
---------------------------------
1-2 & 3-4 Open Single voltage CPU, Vcpuio = Vcore
Open 1-2 & 3-4 Dual voltage CPU, Vcpuio = Vio,
(PP/MT P55C/K6-2).

Archived from groups: alt.comp.hardware.homebuilt (More info?)

On Sat, 19 Mar 2005 23:51:34 GMT, Newfdog
<newfdog2nospam@warp.nfld.net> wrote:

>kony wrote:
>>
>> True. I happen to have at least one of those boards around
>> here *somewhere*, but I dont' even know if it works. A
>> related thread was posted by OP in alt.comp.hardware
>> regarding P200MMX usage, at which point I consulted some
>> docs I'd archived previously. The board does support
>> seperate VIO and Vcore but also has at least some linear
>> supply components, if not entirely linear. Supoprts at
>> least down to 2.5V Vcore though, the jumpers for that are
>> known. Following partially copied from an old Aopen
>> webpage.
>>
>>
>> JP11 CPU Core Voltage (Vcore)
>> ------------------------------------
>> 1-2 3.45V (P54C or IDT C6)
>> 3-4 3.52V (Cyrix or AMD K5)
>> 5-6 2.5V
>> 7-8 3.2V (AMD K6-233)
>> 9-10 2.8V (PP/MT P55C)
>> 11-12 2.9V (AMD K6-166/200)
>>
>>
>> JP12 I/O Voltage (Vio)
>> -----------------------------
>> 1-2 3.45V (default)
>> 3-4 3.52V
>>
>>
>> JP3 JP13 CPU Type (Vcpuio)
>> ---------------------------------
>> 1-2 & 3-4 Open Single voltage CPU, Vcpuio = Vcore
>> Open 1-2 & 3-4 Dual voltage CPU, Vcpuio = Vio,
>> (PP/MT P55C/K6-2).
>>
>>
>>
>
>Ok I have seen this but JP-11 on my board only has 4 pins. How do I jump
> 5-6 from above to get 2.5v ? Also the board jumper location diagram
>shows no JP-12. Where there two different boards manufactured?
>
>Newfdog


If/when I get a chance I'll see if i can find the board I
have, at least I "think" I still have 1 or 2 around here
somewhere. If/when i find it, I'll post back about it.

You report that your board has fewer pins, but where there
are pins, is there allowance on the PCB for the remaining
mentioned pins, solder spots where they could've put more
pins if they'd wanted to but they merely left those off the
board?

Archived from groups: alt.comp.hardware.homebuilt (More info?)

kony wrote:
> On Sat, 19 Mar 2005 16:26:35 -0600, David Maynard
> <nospam@private.net> wrote:
>
>
>
>>>The specs may not help so much, as they were usually drawn
>>>up when boards first came out but not appended later. For
>>>example, most boards with separate vcore setting (dual
>>>voltage)
>>
>>That's going to be what to look for because if the existing pentium 166 is
>>a classic pentium, not MMX, and the motherboard is a single voltage to
>>match then the max is 200 MHz and that's not enough over 166 to bother with.
>
>
>
> True. I happen to have at least one of those boards around
> here *somewhere*, but I dont' even know if it works. A
> related thread was posted by OP in alt.comp.hardware
> regarding P200MMX usage, at which point I consulted some
> docs I'd archived previously. The board does support
> seperate VIO and Vcore but also has at least some linear
> supply components, if not entirely linear. Supoprts at
> least down to 2.5V Vcore though, the jumpers for that are
> known. Following partially copied from an old Aopen
> webpage.
>
>
> JP11 CPU Core Voltage (Vcore)
> ------------------------------------
> 1-2 3.45V (P54C or IDT C6)
> 3-4 3.52V (Cyrix or AMD K5)
> 5-6 2.5V
> 7-8 3.2V (AMD K6-233)
> 9-10 2.8V (PP/MT P55C)
> 11-12 2.9V (AMD K6-166/200)
>
>
> JP12 I/O Voltage (Vio)
> -----------------------------
> 1-2 3.45V (default)
> 3-4 3.52V
>
>
> JP3 JP13 CPU Type (Vcpuio)
> ---------------------------------
> 1-2 & 3-4 Open Single voltage CPU, Vcpuio = Vcore
> Open 1-2 & 3-4 Dual voltage CPU, Vcpuio = Vio,
> (PP/MT P55C/K6-2).

You sure that last line has K6-***2*** in it?

That looks normal for an early MMX board and the reason I ask about K6-2 is
they pull a *lot* more current than the MMX and the linears usually can't
handle it.

Archived from groups: alt.comp.hardware.homebuilt (More info?)

kony wrote:

> On Sun, 20 Mar 2005 00:52:49 -0600, David Maynard
> <nospam@private.net> wrote:
>
>
>
>>>JP3 JP13 CPU Type (Vcpuio)
>>>---------------------------------
>>>1-2 & 3-4 Open Single voltage CPU, Vcpuio = Vcore
>>>Open 1-2 & 3-4 Dual voltage CPU, Vcpuio = Vio,
>>>(PP/MT P55C/K6-2).
>>
>>You sure that last line has K6-***2*** in it?
>>
>>That looks normal for an early MMX board and the reason I ask about K6-2 is
>>they pull a *lot* more current than the MMX and the linears usually can't
>>handle it.
>
>
> No, it did not have K6-2 in it. I copied the jumper
> settings and reformatted, edited, and added that last part.
> It was not meant as a "supported" settings list, merely what
> the jumpers do and what setting would apply to the K6-2.

OK. And I was a bit excessive about the current. I meant if you use a
faster processor, which would the point of course. Current scales almost
linearly (is a bit off because the MMX isn't the same technology). An MMX
233 is about 6.5 amps, a K6-II 300 is about 8.5 amps, and a K6-II 400 is
about 11.3 amps. That's a hefty bump and the regulator heat is compounded
by the lower voltage of the K6-II because it has to drop more.

Unfortunately, those early processor with mobo cache scale in processor
power at about half the MHz increase so a 70% MHz increase, from 233 to
400, only gets around a 35% computational increase.


> Since I have the board, out, I may see if I can get a K6-2
> running on it... if i can only find that box that has all my
> SIMMs in it! Err, and one of the K6-2s, and PSU and... damn
> this is almost like building a computer!

Hehe. Yeah, almost

Archived from groups: alt.comp.hardware.homebuilt (More info?)

kony wrote:
> On Sun, 20 Mar 2005 01:26:28 -0600, David Maynard
> <nospam@private.net> wrote:
>
>>>No, it did not have K6-2 in it. I copied the jumper
>>>settings and reformatted, edited, and added that last part.
>>>It was not meant as a "supported" settings list, merely what
>>>the jumpers do and what setting would apply to the K6-2.
>>
>>OK. And I was a bit excessive about the current. I meant if you use a
>>faster processor, which would the point of course. Current scales almost
>>linearly (is a bit off because the MMX isn't the same technology). An MMX
>>233 is about 6.5 amps, a K6-II 300 is about 8.5 amps, and a K6-II 400 is
>>about 11.3 amps. That's a hefty bump and the regulator heat is compounded
>>by the lower voltage of the K6-II because it has to drop more.
>
>
> True, if it worked it'd be nice and toasty.
>
>>Unfortunately, those early processor with mobo cache scale in processor
>>power at about half the MHz increase so a 70% MHz increase, from 233 to
>>400, only gets around a 35% computational increase.
>
>
> I'll half agree with that, since we're also considering a
> Pentium vs K6-2. 35% could be a lot though towards getting
> over that "hump" where the GUI isn't dreadfully slow
> anymore.
>
>>
>>>Since I have the board, out, I may see if I can get a K6-2
>>>running on it... if i can only find that box that has all my
>>>SIMMs in it! Err, and one of the K6-2s, and PSU and... damn
>>>this is almost like building a computer!
>>
>>Hehe. Yeah, almost
>
>
> Well I was lucky to find the SIMMs quite easily, and already
> had a PSU out and a CPU from another skt. 7 board that was
> in same pile of junk. Even had an empty testbed from a
> former project... and that's where the luck ended. Parts
> together it doesn't POST, I put a Pentium 166MMX in it
> (might've been the original CPU, can't remember) and still
> no POST.
>
> While I was motivated to try it while it was out, I'm not
> motivated enough to troubleshoot a dead socket 7 board
> anymore, for all I know the Dallas RTC could be dead. So
> woohoo, I've reduced the junk pile size by a whopping 12 cu.
> inches, guess Spring cleaning is in order. Seems like just
> yesterday these parts were worth saving up for. Time flies.

Well, I didn't say it wasn't an improvement. It's just not as much as what
one might think from the raw MHz numbers.

Archived from groups: alt.comp.hardware.homebuilt (More info?)

On Sun, 20 Mar 2005 07:51:04 GMT, kony <spam@spam.com> put finger to
keyboard and composed:

>While I was motivated to try it while it was out, I'm not
>motivated enough to troubleshoot a dead socket 7 board
>anymore, for all I know the Dallas RTC could be dead. So
>woohoo, I've reduced the junk pile size by a whopping 12 cu.
>inches,

One man's trash is another man's treasure. I have a dead socket 7
board with a working switchmode regulator. I propose to cut out the
regulator section with a fretsaw and to use this circuit to power my
digital camera from a car cigarette lighter. I'll probably need an Al
clad resistor as a minimum load. I may also need to upgrade the caps
on the input side. Changing certain resistors may also get me a 6V
output for my camcorder. Commercial DC-DC converters are rated for
only 1.5A max, which is probably close to the borderline, especially
when the flash is in use.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.